It is particularly suitable for driving carriage and paper feed stepping motors in printers and similar products. PWM current control fixed off time scheme? Digital load current selection function? Sustained output voltage: 45V? SANYO Semiconductor assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values such as maximum ratings, operating condition ranges, or other parameters listed in products specifications of any and all SANYO Semiconductor products described or contained herein. Package Dimensions unit: mm typ C 28 15 R1.
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Dt Sheet. It is particularly suitable for driving carriage and paper feed stepping motors in printers and similar products. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Package Dimensions unit: mm typ C 15 Connect these pins, fed back through noise filters, to E1 and E2. The set current is controlled by the resistors Re inserted between these pins and ground. Determined by external capacitor and resistor Ct and Rt.
External diode Since this IC adopts a system based on lower side transistor switching drive, an external diode for the regenerative current that occurs during switching is required between VBB and VOUT. Use a Schottky barrier diode with a low feedthrough current. However, note that if the values of Cc and Rc are too large, the SENSE voltage rise will be slowed, and the current setting will be shifted towards a higher current level.
However, this voltage cannot be set to 0V. Since this pin is used to set the output current, applications must be designed so that noise does not appear on this pin's input. The section of the PCB that handles large currents should be designed with a low-impedance pattern, and must be separated from the small signal sections of the circuit.
In particular, the ground for the sense resistor Re must be as close as possible to the IC ground. Operation in hold mode There are cases where a current somewhat larger than the current setting may flow in hold mode light load mode.
Since this IC adopts a lower side switching, lower side sense system, the emitter voltage falls and the sense voltage goes to 0 when the switching state goes to off. The circuit then always turns the output on after the toff period has elapsed. At this time, due to the light load, the existence of the time td, and the fact that the output goes on even if the output current is higher than the set current, the output current will be somewhat higher than the set current.
Applications should set the current setting somewhat lower than required if this occurs. Function for preventing the upper and lower outputs being on at the same time This IC incorporates a built-in circuit that prevents the through currents that occur when the phase is switched. Tables 1 and 2 list that control sequence, and Figure 2 and Figure 3 present the composite vector diagram for this sequence.
Noise filters No. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property.
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PWM Current Control Stepping Motor Driver
Dt Sheet. It is particularly suitable for driving carriage and paper feed stepping motors in printers and similar products. SANYO Semiconductor assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values such as maximum ratings, operating condition ranges, or other parameters listed in products specifications of any and all SANYO Semiconductor products described or contained herein. Package Dimensions unit: mm typ C 15 The set current is controlled by the resistors Re inserted between these pins and ground. Determined by external capacitor and resistor Ct and Rt.
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